/*
 *  Copyright 2012 MyBatis.org
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.mybatis.generator.plugins;

import java.util.List;

import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.PluginAdapter;
import org.mybatis.generator.api.dom.java.Field;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.TopLevelClass;

public class ToStringPlugin extends PluginAdapter
{
    public boolean validate(List<String> warnings)
    {
        return true;
    }
    
    @Override
    public boolean modelBaseRecordClassGenerated(TopLevelClass topLevelClass, IntrospectedTable introspectedTable)
    {
        generateToString(introspectedTable, topLevelClass);
        return true;
    }
    
    @Override
    public boolean modelRecordWithBLOBsClassGenerated(TopLevelClass topLevelClass, IntrospectedTable introspectedTable)
    {
        generateToString(introspectedTable, topLevelClass);
        return true;
    }
    
    @Override
    public boolean modelPrimaryKeyClassGenerated(TopLevelClass topLevelClass, IntrospectedTable introspectedTable)
    {
        generateToString(introspectedTable, topLevelClass);
        return true;
    }
    
    private void generateToString(IntrospectedTable introspectedTable, TopLevelClass topLevelClass)
    {
        Method method = new Method();
        method.setVisibility(JavaVisibility.PUBLIC);
        method.setReturnType(FullyQualifiedJavaType.getStringInstance());
        method.setName("toString"); //$NON-NLS-1$
        if (introspectedTable.isJava5Targeted())
        {
            method.addAnnotation("@Override"); //$NON-NLS-1$
        }
        
        context.getCommentGenerator().addGeneralMethodComment(method, introspectedTable);
        
        method.addBodyLine("StringBuilder sb = new StringBuilder();"); //$NON-NLS-1$
        method.addBodyLine("sb.append(getClass().getSimpleName());"); //$NON-NLS-1$
        method.addBodyLine("sb.append(\" [\");"); //$NON-NLS-1$
        method.addBodyLine("sb.append(\"Hash = \").append(hashCode());"); //$NON-NLS-1$
        StringBuilder sb = new StringBuilder();
        for (Field field : topLevelClass.getFields())
        {
            String property = field.getName();
            sb.setLength(0);
            sb.append("sb.append(\"") //$NON-NLS-1$
                .append(", ") //$NON-NLS-1$
                .append(property)
                .append("=\")") //$NON-NLS-1$
                .append(".append(") //$NON-NLS-1$
                .append(property)
                .append(");"); //$NON-NLS-1$
            method.addBodyLine(sb.toString());
        }
        
        method.addBodyLine("sb.append(\"]\");"); //$NON-NLS-1$
        method.addBodyLine("return sb.toString();"); //$NON-NLS-1$
        
        topLevelClass.addMethod(method);
    }
}
